Thermohydrometer



l March 15, 1949.

L. EDELMANN THERMOHYDROMETER Filed July 5, 1945 ze@ ddmw .1i l l l 1l l l l dial) Patented Mar. 15, 1949 UNITED STATES PATENT GFFICE THERMOHYDROMETER Leo Edelmann, Chicago, Ill. y Application July 3, 1943, Serial No. 493,451 y My invention `relates to improvements in thermohydrometers, and particularly to a syringe type of hydrometer such as ordinarily used in testing battery solutions and the like.

An object of my invention is to provide an instrument of this character that will be of small compact form and size, and which will give a maximum of protection to the specific gravity and temperature indicating means.

Another object is to so construct the parts that the liquid and iioat containing and housing jar or barrel can be molded or otherwise made up of a plastic material, thus expediting manufacture and insuring uniform accuracy, while at the same time providing a jar or barrel that will not be readily broken or damaged when being handled or used, or in shipping.

Still another purpose is to provide a single and unitary barrel or jar member that will house and protect the indicating scale and the indicating portion of a thermometer and will present these portions in position to be readily viewed by the operator or user, in proximity to a specific gravity oat element. y

With the above and other objects in view, some of which will be apparent to those skilled in the art and others of which are inherent in the construction and use of this hydrometer, my invention includes certain novel features ofconstruction and combinations of parts which will be hereinafter set forth in connection with the drawing and then pointed out in the claims.

In the drawing:

Figure 1 is a view in elevation illustrating an embodiment of my invention.

Fig. 2 is a vertical sectional view taken substantially at right angles through the structure as illustrated in Figure 1.

Fig. 3 is a sectional view similar to Fig. 2, showing only the barrel or housing.

Fig. 4 is a top plan View of the barrel or jar.

Fig. 5 is a transverse sectional view substantially on line 4--4 of Fig. 2.

Fig. 6 is a bottom plan view of the jar or as this appears before assembly. q

Fig. '7 is a view in perspective showing the plug employed to close the lower end ofthe jar or barrel. l

The jar or barrel I is made of the usual or ordinary elongated substantially cylindrical shape, and is provided at its upper end with an annular bead 2 received in a correspondingly shaped recess of the mounting sleeve of a suction bulb 3. At its lower end, this barrel or housing I is provided `with an annular bead 4 fitted within a correbarrel 7 Claims. (Cl. i3-34) 2 spondingly shaped recess vof the mounting sleeve of a nozzle member 5. This nozzle member has a liquid receiving chamber 6 in the upper part thereof, withA the passage of the liquid intake and discharge nozzle tip 1 communicating therewith. The barrel or housing I has a liquid receiving chamber 8 therein which is preferably substantially circular in cross section, and while extending longitudinally of the barrel is eccentrically disposed toward one side, as perhaps best shown in Figs. 4 and 5 and 6. The liquid receiving chamber 8'is of relatively less diameter than the outer diameter of the barrel or housing I, and the eccentric disposition toward one side of the barrel or housing leaves the opposite Wall relatively thicker. A substantially crescent shaped thermometer housing opening 9 is molded or otherwise formed in this thickened portion of the barrel or housing, the parts being so constructed Yand formed that the liquid container opening 8 and the thermometer housing opening 9are entirely separate.

This barrel or housing I is preferably molded of a transparentplasti'c material that will be resistant to battery acid, to sulfuric solutions, and in fact to any and all solutions that may be tested with the instrument, and the clear transparent walls thereof will permit a ready view through the barrel or housing in both the portions 8 and 9. This barrel or housing I has the lower end thereof molded or cored out in an enlarged substantially circular opening, as at I0, and the wall II between the openings 8 and 9 is eliminated within the enlarged opening I0. A cork or plug I2, perhaps best shown in Fig. 7, has the main body portion I3 thereof of a size and shape to accomplish a liquid-tight fit within the opening I0, and is provided with an extension plug portion I4 eccentrically disposed on its upper' side in position to t Within the lower end of the liquid receiving compartment 8, thereby making a liquid-tight closure between the extension plug or cork I4 and the wall of the opening 8. This cork or plug I2 has a liquid passage I5 through the body portion I3 and the extension I4 thereof establishing communication from the liquid chamber 6 of the nozzle member 5 to the liquid and float receiving chamber 8, and a thermometer receiving opening I6 is provided through the body portion I3 of the cork or plug to be substantially centered with the crescent shaped thermometer housing opening 9. l

In molding or otherwise making the barrel.o r housing I, it will be .found perhapsnecessary .or advisable to leave an opening through the-'upper end in line with the thermometer housing opening 9, and this opening will be closed by a suitable plug or other ller I 'I. A cork or stopper IB is tted in the upper end of the opening 8 to guard against a specic gravity oat element I9 in this liquid and iioat chamber 8 rising into the bulb 3, and this cork or stopper is provided with a suitable opening to establish free communication between the interior of the suction bulb 3 and the upper end of the container opening 8.

A thenonete 2,0"is niuntedthro'ugh the opening I6 'withf'its indicating portion"2|" extending upwardly substantially centrally and housed Within the substantially crescent shaped housing openl ing 0, and with its lower bulb or temperature influenced end 22 extending into the liquid chamber t of the nozzle member where it will Vbeeitpos'ed to a test quantity of liquid as drawn through the nozzle I and into the liquid andzflo'a't opening 8. f A scale sheet member 23 is inserted in the thermometer housing-opening!) adjacent to the indicating -portionv2l-1ofthe thermometer 2 0, and chiome-side this scalemember carr be marked in degrees of temperatura-as at g4, vwhereas on the opposite side `vof,'theindicatingportion 2"I of the thermometer the scale caribe-marked with'flgures, as at 25, indicating corrections vatV diierentfliquid temperatures oihthe'y test quantity' of'liquid," as indicated by the thermometergll.-A hasbeenstated,` the'bar-rel or housing I ca be molded orotherwise 4made up ofsany suitable plastic materialrand the 'parts canbereadily and eov uenien-Izly-'assemble-:djA A-int'o the complete lhydr'om'eter. Due to the r`peculiar shape ofthe `jar or barrel; andfdue to the fact' that the wall -II extends-somewhat transversely therein-the barrel or-jarwill be strong and substantially'resistant to crushing or breakage', even thoughthe walls be made relatively thin; andwhenl the thermometer is assembled for use this-barrel orhousing structure will aiordavmaximum vof protection for the float -element land the thermometer `*20. The indicatingportion g I; ofw the yth'ermometer will' be housed and 'protected within the housing 'opening 9, l d thebulb portionzigjofv thethermometer-will 1n ther-liquidfchamber- 6 andswill be prosolose'din'Eig.-5; the scale member 23 can be a single piece ofsheet material bent and shaped tov rlt Within the opening il;A substantially behind and around the indicating portion 2I-of-thether morneter; with' the side portionsof this sheet disposedon opposite sides of Athe indicating' portion to thusYpresentjfthel indicationsfat-24 and 25 eloselyadlacentto the" indicatingv column lof1 this indicating portonzzf ,wj Y l.

egauge stein 26A of the Il oat element I9 can be 'vided Vwith ascale showing the indications thereof torep'resent the specific gravity vof battery acid or any other solution *to vbe tested; and'in the present instance thisl specic 'gravity indicatingv float element isfmarked'oif in divisions representing substantiallytwo pointsdifference'of spe# meg'ravity, vwith v`thexscare calibrated at so dgreeSF.; vor irl-'other VWares atfsoaso; with the' calibration" point" or temperature "on vthe v"scale y 24 ind ated eszrb @in tlisal'fi the. 'divisions of t ses @we ad below 'zro el Wfiglfee intervals and, 'spebicer'avfv orectionsfor temperature l"can "be e e 4 cated on the stem 26 of the oat I9 at the liquid level within the liquid chamber opening 3.

In the present instance I have shown an adaptation capable of being used to test liquid solutions within a specific gravity range from 1.070 to 1.430, and a temperature range of from 30 degrees below zero F. to degrees above zero F., with accompanying and appropriate corrections indicated both above and below the calibration temperature at 80 `dgees"'"1=' E' L s' While lthisfin'vention has been described with respect to certain particular embodiments which give satisfactory results, it will be understood that various changes and modifications can be made withoutdeparting from the spirit and scope of fr 'myinvention, and it is intended therefore in the appended claims to cover all such changes and inodictions. I'claim:

l. A combined liquid barrel and thermometer housing alf fl a thermohydmmef, Comprising an 'elongated' integral molded plastic member of Sfl'lbstntllly" Cylindrical- Outer term, Said lar llaving a liquid receiving barrel'opening oi substantially less-diameter than the outer diameter of said lll extending longitudinally" therelhrough and offset eccentrical-ly toward one side of said jar, and being provided with a substantially 'crescent shaped thermometer housing 'opening extending longitudinally of the j ar inthe side away from the barrel opening, a closureior one 'end of saidthenmometer housing opening, said j ar'beingprovided at one-end with an enlarged opening substantially circularsin cross section --and having the wall'between the liquid barrel and thermometer housing openings stopped at the inner terminus of 'said enlarged opening, and a/closure member ijltted in said enlarged opening and"having a protuberance ektending into'and" closing the adjacent end of the'l liquid receiving barrel, said closuremember hlviig a liquid-Passage therethrough leading to the liquid receiving barrel opening and beingpro vided' with all' Opening.: aligning with the, thermometer housing opening. e'

2. A combined liquid barrel and thermometer housing lar 4for a, thefmohyclrometer comprising an elongated integral molded transparent-plastic member of substantially cylindrical outeriorm, said jar having a'liquidreceiving barrel opening of substaritia-llyless diameter' than theel outer diameter of said jar 4eistendnglongitudinally therethrough @ed QSCt @C Clllfally toward one side of said jar, and being provided with athermometer housingefopening extending rvlongitudi nallyof the jar inthe thickened par-t thereof;l and e essere lor ene. @ed eisenthermmetevhusing opening; said jar being provided at one end with an enlarged opening substantiallycircular iii-cross section and having the wall between-the liquid jar and thermometear'housing` openings stopped at the inner terminusy of said enlarged opening. '3; A thernflohydrometer jar comprising an elongated generally cylindrical integral transparent member having. e liquid lflffivingbarrelY Opening of substantially ular cross sectionV extending longitudinally ther hrough ci relatively 'lessfdlameter than the dia tei-of said cylindrical-member and offset toward one side thereof, saidjar member being PTQYC@ With '3J longitudinally @X- tending thermometer housing openingof substan tiallyk crescent shape oiflset `toward'sthe opposite sideof; the jarmemben'anddying substantially around the adjacent side-of; the lbarrel opening, said jar member being providedl at one' end'with an enlarged opening substantially circularin cross section and having the wall between the liquid barrel and the thermometer housing openings stopped at the inner terminus of said enlarged opening.

4. A thermohydrometer comprising a combined liquid barrel and thermometer housing jar member of integrally molded plastic of substantially elongated cylindrical outer form, said jar having a liquid receiving barrel opening of substantially less diameter than the outer diameter of said jar extending longitudinally therethrough and offset eccentrically toward one side of the jar, and being provided with a substantially crescent shaped thermometer housing opening extending longitudinally of the jar in the side away from the barrel opening, a closure at one end of the jar for said thermometer housing opening, said jar being provided at the other end with an enlarged opening substantially circular in cross section and having the wall between the liquid Abarrel and thermometer housing openings stopped at the inner terminus of said enlarged opening, a closure member tted in said enlarged opening and having a protuberance extending into and closing the adjacent end of the liquid receiving barrel, said closure member having a liquid passage therethrough leading to the liquid receiving barrel opening and being provided with an opening aligned with the thermometer housing opening, a thermometer tted through the last mentioned opening with an indicating stem Within the thermometer housing opening and a temperature inuenced portion extending outwardly from said closure member, a liquid nozzle tted at the end of the jar and enclosing the temperature iniiuenced portion of the thermometer, and suction means at the opposite end of the jar communicating with the liquid receiving barrel opening.

5. A thermohydrometer jar comprising an elongated generally cylindrical integral transparent molded plastic member having a liquid receiving barrel opening of substantially circular cross section extending longitudinally therethrough and of relatively less diameter than the diameter of the member and offset toward one side thereof, and having a thermometer housing "y opening of substantially crescent shaped cross section lying around the inner side of the circular opening with the jar member thus having a dividing wall extending across between the openings and each of the openings having a single outer transparent viewing Wall, said jar having the thermometer housing opening closed at one end and having an enlarged opening at the other end with the dividing wall stopped at the inner end of the enlarged opening.

6. A thermohydrometer jar comprising an elongated integral transparent moulded plastic member having a liquid receiving barrel opening of substantially circular cross section extending longitudinally therethrough and offset toward one side thereof, and having a thermometer housing opening of substantially crescent shaped cross section lying around the inner side of the circular opening with the jar member thus having a dividing Wall extending across between the openings and each of the openings having a single outer transparent viewing Wall, said jar having the thermometer housing opening closed at one end and having an enlarged opening at the other end.

7 A thermohydrometer jar comprising an elongated integral transparent molded plastic member having a liquid receiving barrel opening extending longitudinally therethrough and oiset toward one side thereof, and having a thermometer housing opening extending longitudinally thereof at the inner side of the liquid receiving barrel opening with the jar member thus having a dividing wall extending across between the openings and each of the openings having a single outer transparent viewing wall, said jar having the thermometer housing opening closed at one end and having an enlarged opening at the other end.

LEO EDELMANN.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,923,192 Edelmann Aug. 22, 1933 2,043,405 Edelmann June 9, 1936 2,288,560 Webber June 30, 1942 

